Prevod

An unskilled singer who accompanied himself on the lyre was always singing in a plastered room, where the echo of his voice persuaded him that he sang extraordinarily well. Puffed up with pride, he decided that he ought to perform in the theater too. But when he took the stage, he sang so badly that the audience pelted him with stones and drove him out.

So too, some orators who think themselves important in the schools prove worthless when they enter public life.